Mortar projector



- Dec. 22, 1925- c. c. HANSEN I MORTAR PROJECTOR Fild Sept. 24. 1924 ll a l 1,

INVENTOR PK (Zane: (Z'Handen .Hl5 AT Patented Dec. 22, 1925.

UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN, OE EASTON, PENNSYLVANIA, ASSIGNOB 'IO INGERSOLL-BAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION 01' NEW JERSEY.

Mona-An rnomcron.

App11oation filed September 24, 1924. Serial No. 789,448.

To all whom it may concern:

- Be it known that I Cannes 0. Hansen, a citizen of the United States, and a resident of Easton, county of Northampton, and State of Pennsylvania, have invented a certain Mortar'Projector, of which the following is a specification accompanied by drawings.

This invention relates to mortar projecting devices and more particularly that type of device which utilizes for its motive force a fluid, such as compressed air.

One object of the invention is to project the mortar with as little waste mortar as possible and with efficient and economical air consumption.

The type of machine to which this invention relates is thatin which mortar is pro- 'ected from a nozzle attached to a suitable 0 per or other supplying means With sufficlent force to carry it a considerable distance' through the air and at the wall or other surface to be covered. One difficulty in constructing a machine of this type is the fact that the ingredients of the mortar mixture tend to separate. For instance, if the mortar is composed of sand, cement, lime and water mixed homogeneously, when it is attempted to project the material the apparatus is apt to cause these elements to come out separatel The water may first be removed, then 1; e cement will be blown from the sand, and lastly the sand particles come cleaned of the rest of the mortar ingredients. This trouble is avoided in the construction hereinafter described, in which the mixture is supplied partly by gravity and partly by an air jet which produces suction, and is ejected by means of the air jet and a supplemental ring jet located around the nozzle.

The invention will be more clearly understood by reference to the drawlngs, 'in which- Fi ure 1 is an elevation partly in section showlng the internal arrangement of the parts of the device constructed in accordanoe'with the practice of the invention;

Figure 2 is a section taken along the line 5-5 of Figure 1 looking in the direction of the arrows, and

Figure 3 is a form of nozzle.

Referring to the drawin s, the device includes a hopper T attache to the flange U front view of a preferred of the body V, which is provided with a chamber W for receiving material J from the hopper T through the restricted opening B. The hopper T is preferably conical in sha e, as shown in the drawings, and 'gri s or andles E are provided by which the operator can support the device.

The body V is hollow around the chamber W having a space X for the compressed a1r or other suitable motive fluid to flow through a ring jet Y formed by the forward tapered edge of the chamber W and the nozzle Z which is attached to the body V by means of bolts 6 passing through the flange 0 formed on the nozzle Z into the forward face of the body V. Within the chamber W there is provided a jet (1 centrally located and similar in its functions to the et D of the first described embodiment. The et d is adapted to draw by suction the material which flows b gravity into the chamber W and to pro ect it into the stream of air issuing from the jet Y by which it is carried at high velocity through the nozzle Z and projected into the atmosphere.

Means are provided to apportion the amount of air passing through the jets d and Y and to this end the jet d is provided with a tapered seat e for a needle valve 7 adjustable with respect to the seat by reason straight, depending upon its use.

I claim:

1. A mortar projector including a hopper having a restricted outlet, a chamber at said outlet'to receive material by gravity from said hopper a nozzle, a jet for compressed motive iiuid centrally located in said chamber and adapted to draw material from said chamber and project the same into the nozzle, a ring jet for compressed motive fluid concentric with said central jet adapted to impart additional velocity to the material projected by said central jet and means to regulate the relative amounts of motive fluid delivered to the two jets.

2. A mortar projector includin a hopper having it restricted outlet, in, chum er at said outlet to receive material by gravity from said hop )er, a nozzle, a jet for compressed motive uid located in said chamber and adapted to project material from said chamher into the nozzle, :1 ring jet for compressed motive fluid adapted to lmpart additional velocity to the material pro'ected by the central jet, and a needle valve or regulating the flow of pressure fluid through the central jet 15 in relation to the ring jet.

in testimony whereof I have signed this specification.

CHARLES C. HANSEN. 

